What role does a TSC play in call routing?

The role of a Tactical Session Controller (TSC) in call routing primarily involves the analysis of call destinations and the direction of calls according to established policies. This means that when a call is made, the TSC evaluates the various possible destinations and applies predefined routing policies to determine the most appropriate path for the call.

This capability ensures optimal routing based on factors like call priority, destination type, or operational requirements, which enhances efficiency and reliability in communications. By utilizing policies, the TSC can dynamically adapt to changes in the network conditions, service availability, or user requirements, ensuring that calls are routed effectively and in accordance with the organization's communication strategies.

The other options suggest limited functionalities of a TSC, such as only facilitating internal communication or focusing solely on emergency calls, which do not encompass the full scope of its capabilities in call routing.